Hi Nick,
I know I alread emailed you some suggestions, but for the archive and other users I thought I need to mention the Omega Super 3R, since no one else has done so. For a price way below $1500 you get electrostatic speed and transparency. The left-over money is enough to buy a sealed sub, which can be nicely integrated with the Omega's. I have and like the Spendor S3/5 as well, but did prefer the Omega's in my own system.
Some speakers I did consider, when looking around for monitors:
Omega Super 3R
Spendor S3/5
Reference 3A Dulcet or De Capo
Green Mountain Europa
Silverline SR 11, SR15, or SR17
Soliloquy 6.0i
Totem Arro
Good luck,
Rene